Alternating current power supply filter for military computer room network equipment

Abstract

The utility model provides a military machine room network equipment AC power supply filter, which relates to the technical field of power adapters and comprises a filter circuit including a differential mode filter circuit, a first-stage common mode filter circuit and a second-stage common mode filter circuit. The input end of the filter circuit is set as a power supply input end, the power supply input end is respectively set as a zero line and a live line, and the differential mode filter circuit, the first-stage common mode filter circuit and the second-stage common mode filter circuit are sequentially connected to the power supply input end. Differential-mode interference and common-mode interference in a line are filtered through the differential-mode filter circuit, the first-stage common-mode filter circuit and the second-stage common-mode filter circuit, the switches and the filter circuits are installed in the independent cavities, and the cavities are independent from one another, so that mutual coupling interference can be effectively avoided; and the power supply input end adopts the triangular socket with the aluminum alloy shell, so that quick plugging and unplugging can be realized, and good filtering efficiency is achieved.

Description

Technical Field

[0001] This utility model relates to the field of power adapter technology, specifically to an AC power filter for military computer room network equipment. Background Technology

[0002] A military network device needs to meet the requirements of GJB 151B-2013 "Electromagnetic Emission and Sensitivity Requirements and Measurements for Military Equipment and Subsystems".

[0003] Because it uses a triangular socket without electromagnetic shielding and filtering functions, it cannot meet the test requirements in GJB 151B-2013. Based on its electromagnetic and structural characteristics, our company has developed a military network equipment power module AC power filter that fully utilizes the structural shielding characteristics to achieve the best filtering effect. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an AC power filter for military computer room network equipment, which solves the problem that existing power filters, which use triangular sockets, lack electromagnetic shielding and filtering functions and cannot meet the test requirements in GJB 151B-2013.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: an AC power filter for military computer room network equipment, comprising a filter circuit, wherein the filter circuit includes a differential mode filter circuit, a first-stage common-mode filter circuit, and a second-stage common-mode filter circuit.

[0008] The input terminal of the filter circuit is set as the power input terminal, and the power input terminal is set as the neutral wire and the live wire respectively. The differential mode filter circuit, the first-stage common mode filter circuit and the second-stage common mode filter circuit are connected to the power input terminal in sequence.

[0009] Preferably, the differential-mode filter circuit includes a differential-mode inductor L1, a differential-mode capacitor CX1, a common-mode capacitor CY1, and a common-mode capacitor CY2, wherein:

[0010] The live wire input terminal is connected in series with a differential mode inductor L1, and the differential mode capacitor CX1 is connected in parallel to the line.

[0011] Preferably, the first-stage common-mode filter circuit includes a common-mode filter inductor L2, a common-mode filter capacitor CY1, and a common-mode filter capacitor CY2.

[0012] One end of the common-mode filter capacitor CY1 is connected in parallel to the live wire, and the other end of the common-mode filter capacitor CY1 is connected to the chassis ground. One end of the common-mode filter capacitor CY2 is connected in parallel to the neutral wire, and the other end of the common-mode filter capacitor CY2 is connected to the chassis ground. The input terminal of the common-mode filter inductor L2 is connected to one end of the differential-mode inductor L1 and one end of the live wire, respectively.

[0013] Preferably, the second-stage common-mode filter circuit includes a common-mode filter inductor L3, a common-mode filter capacitor CY3, and a common-mode filter capacitor CY4.

[0014] One end of the common-mode filter capacitor CY3 is connected in parallel to the live wire, and the other end of the common-mode filter capacitor CY3 is connected to the chassis ground. One end of the common-mode filter capacitor CY4 is connected in parallel to the neutral wire, and the other end of the common-mode filter capacitor CY4 is connected to the chassis ground. The input terminal of the common-mode filter inductor L3 is connected to one end of the differential-mode inductor L2 and one end of the live wire, respectively.

[0015] Preferably, a switch is provided between the input terminal of the differential mode filter circuit and the neutral wire, and between the input terminal of the differential mode filter circuit and the live wire. The switch is installed in an independent cavity, and the filter circuit is installed in an independent cavity.

[0016] Preferably, the power input terminal uses a triangular socket and the outer casing is made of aluminum alloy.

[0017] (III) Beneficial Effects

[0018] This utility model provides an AC power filter for military computer room network equipment. It has the following beneficial effects:

[0019] 1. In this utility model, differential mode capacitor CX1 is used as differential mode filter capacitor and differential mode inductor L1 is used as differential mode filter inductor. The differential mode capacitor is mainly designed to filter out differential mode interference of 10KHz-500KHz in the circuit.

[0020] 2. In this utility model, common-mode filter capacitors CY1, CY2, CY3, and CY4 are mainly used to filter out common-mode interference in the line from 10MHz to 18GHz, while common-mode filter inductors L2 and L3 are mainly used to filter out common-mode interference in the line from 200KHz to 100MHz. Common-mode interference is filtered out by combining the frequency characteristics of different devices.

[0021] 3. In this utility model, the switch and the filter circuit are installed in an independent cavity. The cavities are independent of each other, which can effectively avoid mutual coupling interference. The power input terminal adopts a triangular socket, and the outer shell is made of aluminum alloy. This not only meets the requirements of military network equipment that uses a universal quick-plug triangular charging port, but also has good filtering performance. Attached Figure Description

[0022] Figure 1 This is a circuit diagram of an AC power filter for a military computer room network device according to the present invention.

[0023] Figure 2 This is a schematic diagram of the assembly of an AC power filter for a military computer room network device. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] As shown in the figure, the AC power filter for military computer room network equipment provided by this utility model includes a filter circuit. The filter circuit adopts a three-stage filter circuit, which includes a differential mode filter circuit, a first-stage common-mode filter circuit, and a second-stage common-mode filter circuit.

[0026] The input terminal of the filter circuit is set as the power input terminal, and the power input terminal is set as the neutral wire and the live wire respectively. The differential mode filter circuit, the first-stage common mode filter circuit and the second-stage common mode filter circuit are connected to the power input terminal in sequence.

[0027] The differential-mode filter circuit includes a differential-mode inductor L1, a differential-mode capacitor CX1, a common-mode capacitor CY1, and a common-mode capacitor CY2. The live wire input is connected in series with the differential-mode inductor L1, and the differential-mode capacitor CX1 is connected in parallel to the circuit. As an AC power supply filter, it needs to meet the radiation design requirements of CE102 and RE102. The differential-mode capacitor CX1 is the differential-mode filter capacitor, and the differential-mode inductor L1 is the differential-mode filter inductor. The differential-mode capacitor design is mainly used to filter out differential-mode interference in the 10kHz-500kHz range in the circuit.

[0028] The first-stage common-mode filter circuit includes a common-mode filter inductor L2, a common-mode filter capacitor CY1, and a common-mode filter capacitor CY2. One end of the common-mode filter capacitor CY1 is connected in parallel to the live wire, and the other end of the common-mode filter capacitor CY1 is connected to the chassis ground. One end of the common-mode filter capacitor CY2 is connected in parallel to the neutral wire, and the other end of the common-mode filter capacitor CY2 is connected to the chassis ground. The input terminal of the common-mode filter inductor L2 is connected to one end of the differential-mode inductor L1 and one end of the live wire, respectively.

[0029] The second-stage common-mode filter circuit includes a common-mode filter inductor L3, a common-mode filter capacitor CY3, and a common-mode filter capacitor CY4. One end of the common-mode filter capacitor CY3 is connected in parallel to the live wire, and the other end of the common-mode filter capacitor CY3 is connected to the chassis ground. One end of the common-mode filter capacitor CY4 is connected in parallel to the neutral wire, and the other end of the common-mode filter capacitor CY4 is connected to the chassis ground. The input terminal of the common-mode filter inductor L3 is connected to one end of the differential-mode inductor L2 and one end of the live wire, respectively.

[0030] Common-mode filter capacitors CY1 and CY2 are the first-stage common-mode filter capacitors, while common-mode filter capacitors CY3 and CY4 are the second-stage common-mode filter capacitors. Common-mode filter inductor L2 is the first-stage common-mode filter inductor, and common-mode filter inductor L3 is the second-stage common-mode filter inductor. Common-mode filter capacitors CY1, CY2, CY3, and CY4 are mainly used to filter out common-mode interference in the line from 10MHz to 18GHz, while common-mode filter inductors L2 and L3 are mainly used to filter out common-mode interference in the line from 200KHz to 100MHz. Common-mode interference is filtered out by combining the frequency characteristics of different components.

[0031] Switches are installed between the input terminal of the differential mode filter circuit and the neutral wire, and between the input terminal of the differential mode filter circuit and the live wire. The switches are installed in independent cavities, and the filter circuit is installed in independent cavities. The cavities are independent of each other, which can effectively avoid mutual coupling interference.

[0032] The power input terminal uses a triangular socket, and the outer casing is made of aluminum alloy, which not only meets the requirements of military network equipment that uses a universal quick-plug triangular charging port, but also has good filtering performance.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An AC power filter for military computer room network equipment, characterized in that: The filter circuit includes a differential-mode filter circuit, a first-stage common-mode filter circuit, and a second-stage common-mode filter circuit. The input terminal of the filter circuit is set as the power input terminal, and the power input terminal is set as the neutral wire and the live wire respectively. The differential mode filter circuit, the first stage common mode filter circuit and the second stage common mode filter circuit are connected to the power input terminal in sequence. A switch is set between the input terminal of the differential mode filter circuit and the neutral wire, and between the input terminal of the differential mode filter circuit and the live wire. The switch is installed in an independent cavity, and the filter circuit is installed in an independent cavity.

2. The AC power filter for military computer room network equipment according to claim 1, characterized in that: The differential-mode filter circuit includes a differential-mode inductor L1, a differential-mode capacitor CX1, a common-mode capacitor CY1, and a common-mode capacitor CY2, wherein: The live wire input terminal is connected in series with a differential mode inductor L1, and the differential mode capacitor CX1 is connected in parallel to the line.

3. The AC power filter for military computer room network equipment according to claim 2, characterized in that: The first-stage common-mode filter circuit includes a common-mode filter inductor L2, a common-mode filter capacitor CY1, and a common-mode filter capacitor CY2; One end of the common-mode filter capacitor CY1 is connected in parallel to the live wire, and the other end of the common-mode filter capacitor CY1 is connected to the chassis ground. One end of the common-mode filter capacitor CY2 is connected in parallel to the neutral wire, and the other end of the common-mode filter capacitor CY2 is connected to the chassis ground. The input terminal of the common-mode filter inductor L2 is connected to one end of the differential-mode inductor L1 and one end of the live wire, respectively.

4. The AC power filter for military computer room network equipment according to claim 3, characterized in that: The second-stage common-mode filter circuit includes a common-mode filter inductor L3, a common-mode filter capacitor CY3, and a common-mode filter capacitor CY4; One end of the common-mode filter capacitor CY3 is connected in parallel to the live wire, and the other end of the common-mode filter capacitor CY3 is connected to the chassis ground. One end of the common-mode filter capacitor CY4 is connected in parallel to the neutral wire, and the other end of the common-mode filter capacitor CY4 is connected to the chassis ground. The input terminal of the common-mode filter inductor L3 is connected to one end of the differential-mode inductor L2 and one end of the live wire, respectively.

5. The AC power filter for military computer room network equipment according to claim 4, characterized in that: The power input terminal uses a triangular socket, and the outer casing is made of aluminum alloy.

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